Arwady says Chicago will stick with CDC guidance on mask wearing Jun 30, 2021 | coronavirus, Top Stories, Vaccination Chicago’s top health official said Tuesday that they will continue to follow the Centers for Disease Control and Prevention’s guidance on mask-wearing.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.